DJVU to JP2 Converter

DJVU to JPEG 2000 — superior quality, free online

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Superior Compression

JP2 wavelet compression outperforms standard JPEG — extract DJVU pages with better quality at comparable file sizes.

Secure Pipeline

Uploaded DJVU files are deleted after conversion. JP2 output files are purged automatically within 24 hours.

Remote Processing

Wavelet compression runs on cloud servers — your device stays completely free during DJVU to JP2 conversion.

How to convert DJVU to JP2

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose jp2 or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your jp2 file right afterwards

About formats

DjVu (pronounced "deja vu") is a document format developed at AT&T Labs by Yann LeCun, Leon Bottou, Patrick Haffner, and Paul Howard, first released in 1996. The format was specifically designed for storing scanned documents and images at very high compression ratios while maintaining visual quality suitable for on-screen reading. DjVu achieves this through a layered approach: the document image is separated into a foreground layer (text and line art at full resolution), a background layer (photographs and textures at reduced resolution), and a mask layer that determines which layer is visible at each pixel. This separation, combined with purpose-built compression algorithms for each layer type, typically produces files 5-10 times smaller than equivalent JPEG or PDF scans. One advantage is exceptional compression on scanned pages — a 300 DPI color scan that might occupy 25 MB as TIFF or 500 KB as JPEG typically compresses to 40-80 KB in DjVu while preserving legible text. The progressive rendering model is another strength: DjVu files stream efficiently over networks, displaying a readable low-resolution version almost immediately while progressively refining to full quality. The format supports multi-page documents, embedded text layers for searchability, hyperlinks, annotations, and a shared dictionary mechanism that further compresses collections of similar pages. DjVu is widely used by libraries and archives for digitized historical documents and manuscripts.
Developer: AT&T Labs
Initial release: 1996
JP2 (JPEG 2000 Part 1) is an image format based on the JPEG 2000 compression standard, developed by the Joint Photographic Experts Group and published as ISO/IEC 15444-1 in December 2000 as the successor to the original JPEG standard. Unlike JPEG's block-based discrete cosine transform, JPEG 2000 uses discrete wavelet transform (DWT) compression, which eliminates the characteristic 8x8 block artifacts visible in highly compressed JPEG images and instead produces a smooth, gradual quality degradation. The format supports both lossy and lossless compression within the same codestream, along with features absent from original JPEG: 16-bit and higher bit-depth images, arbitrary numbers of color channels, alpha transparency, region-of-interest coding (allocating more bits to important areas), and progressive quality or resolution refinement from a single compressed stream. One advantage is superior image quality at low bit rates — JPEG 2000 produces visibly cleaner images than JPEG at equivalent file sizes, particularly below 0.5 bits per pixel where JPEG exhibits severe blocking. The progressive decoding capability is another strength: a single JP2 file can be decoded at any resolution or quality level without encoding multiple versions, valuable for remote sensing and medical imaging where the same image must serve both thumbnail browsing and full-resolution analysis. JP2 is the mandated format for digital cinema (DCI), the preferred format in geospatial data (GeoJP2), and widely adopted in cultural heritage digitization.
Initial release: December 2000

Frequently Asked Questions

Why convert DJVU to JP2?

JP2 uses wavelet compression — it delivers better image quality than standard JPEG at equivalent file sizes.

What opens JP2 files?

IrfanView, GIMP, Adobe Photoshop, and modern web browsers like Chrome and Safari support JPEG 2000 files.

Is JP2 better than regular JPEG?

For quality — yes. JP2 avoids block artifacts and supports lossless compression, but is less widely supported.

Is the conversion free?

Yes — DJVU to JP2 conversion costs nothing. Premium tiers unlock batch processing and larger file support.

Does JP2 support transparency?

Yes — unlike standard JPEG, JPEG 2000 supports alpha channel transparency in addition to higher quality.

How fast is the process?

Most conversions complete in seconds. Cloud servers handle the wavelet compression efficiently.

DJVU to JP2 Quality Rating

4.4 (12 votes)
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